Cone Plain (double Type)

Cone Plain (Double Type) Adapters, also widely known as double cone joiners or male-to-male ground glass adapters, are essential laboratory glassware components designed to connect two separate laboratory apparatuses featuring female ground glass sockets. Fabricated from premium-grade borosilicate glass, these adapters feature a streamlined, straight-tube profile with a precision-ground male cone joint at both ends.

The double-cone configuration allows laboratory technicians to couple identical or differing socket sizes directly inline, which is highly useful when constructing compact distillation trains, connecting multi-neck reactors to auxiliary vapor traps, or linking vacuum manifolds. Each male joint is meticulously ground to standard international taper dimensions, ensuring a flush, gas-tight, and vacuum-capable seal when sealed with standard laboratory clips and lubricants.

Key Features

• Manufactured from high-purity borosilicate 3.3 glass for maximum chemical resistance and superior thermal durability
  
• Straight inline double male cone configuration optimized for compact, low-clearance structural assemblies
  
• Meticulously ground interchangeable conical joints to ensure a completely airtight, vacuum-compliant fit
  
• Heavy-wall center tubing engineered to withstand mechanical clamping pressures and localized physical strain
  
• Smooth, non-porous internal glass pathway to allow unrestricted fluid or vapor transition without sample retention
• International Standards

Our double-cone plain adapters are engineered and manufactured in strict compliance with globally accepted dimensional and engineering parameters, ensuring seamless cross-brand compatibility:

• ISO 383 – Laboratory Glassware – Interchangeable Conical Ground Joints
  
• ASTM E438 – Standard Specification for Glasses in Laboratory Apparatus Manufacturing
  
• DIN 12249 – European Joint Geometry Regulations for Conical Ground Tapers
• Available in parallel standard joint sizes (e.g., 14/23 to 14/23, 19/26 to 19/26, 24/29 to 24/29, 29/32 to 29/32) as well as reducing/expanding configurations (e.g., 14/23 to 19/26 or 19/26 to 24/29). Custom lengths, intermediate center bulbs, or integrated vacuum takeoff side-arms can be custom manufactured per bulk specification.

Applications

Extensively utilized in synthetic organic chemistry setups, fractional distillation lattices, vacuum line distributions, pharmaceutical R&D lines, and academic teaching laboratories requiring flexible, modular structural coupling between ground glass assemblies.

Why Choose Our Products

• Export-grade glassware featuring optimal optical clarity and structural stress relief via thorough computer-controlled annealing
  
• Finely polished, precision-ground joint surfaces that eliminate micro-gaps and prevent vapor or pressure bypass
  
• Excellent mechanical centering and geometric alignment to eliminate unbalanced stress inside laboratory scaffolding frames
  
• Trusted OEM manufacturing partner for global laboratory equipment catalog vendors, procurement agencies, and wholesale scientific suppliers